Template:Math/EQ Euler03

$\frac{\partial (\rho \overrightarrow{v})}{\partial t}+\mathrm{\nabla }\cdot [(\rho \overrightarrow{v})\overrightarrow{v}]=-\mathrm{\nabla }P-\rho \mathrm{\nabla }\mathrm{\Phi }$